I like what you did with the Catch Can, but you really really limited the amount of airflow that can squeeze into that small pipe. NA you it should work fine, but on boost you need something thicker.
For my PCV system I even the same thickness of tubing for the catch can.
You just have too much pressure under boost. Look at these two posts from Coheed, I think they will explain a lot
Originally Posted by
Coheed We dynod a mustang last night. We gained 100lb ft of torque, and 40whp on a T76 turbo setup just by taking the oil cap off. That is how much relieving the crankcase pressure helped.
Originally Posted by
Coheed Check this out, we have two breather filters on the valvecover of this mustang. I said "hey we have a ton of blowby coming out of these breathers!"
Seriously, there was so much blowby the filters were soaked in oil and the filters would balloon up under full boost. So I said, lets take off the oil cap and I will hold a rag over the hole while we do a pull.
The look on their face was priceless. HOLY $hit!!!! Bam! 40whp just like that. Car made almost 600whp before and 638whp after, just by removing the oil cap to relieve some pressure.